Transition zone index and bothersomeness of voiding symptoms as predictors of early unfavorable outcomes after transurethral resection of prostate.

INTRODUCTION

The objective of this study was to establish the influence of preoperative parameters on unfavorable outcomes after transurethral resection of the prostate.

PATIENTS AND METHODS

In a prospective study, 90 patients underwent transurethral resection of the prostate. The standardized protocol was used to investigate parameters, preoperatively and after 6 months. The baseline values were analyzed with respect to the probability of predicting the effectiveness of the outcome.

RESULTS

All preoperative parameters changed significantly, from 55.1 to 116% (p < 0.001). Treatment was effective for 85.6% of the patients, and the outcomes were unfavorable for 14.4%. The monovariate analysis detected the transition zone index (cut-off 0.48, p = 0.002, OR 7.48) as independent predictor of ineffective outcome. Logistic regression analysis found two the most important parameters - transition zone index (OR 30.26, p = 0.002) and bothersomeness of voiding symptoms (OR 20.7, p = 0.008) for unfavorable outcomes.

CONCLUSIONS

The parameters that are traditionally used cannot predict unfavorable outcomes. The transition zone index and bothersomeness of voiding symptoms are most important parameters for predicting an unfavorable outcome after TURP.